// Licensed under the Apache License, Version 2.0 (the 'License'); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an 'AS IS' BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

'use strict';

var debug = require('debug')('nano/logger');

module.exports = function logging(cfg) {
  var log = cfg && cfg.log;
  var logStrategy = typeof log === 'function' ? log : debug;

  return function logEvent(prefix) {
    var eventId = (prefix ? prefix + '-' : '') +
      (~~(Math.random() * 1e9)).toString(36);
    return function log() {
      logStrategy.call(this, eventId, [].slice.call(arguments, 0));
    };
  };
};
